calls but hangs up when you answer

Keeps calling and I finally answered but they hung up immediately

i have received a call twice from this number, when i answer they hang up. if i call back it says your call is important and stay on the line.

leaves a message for a missed call but never leaves a definitive message to say who they are / where industry they're from / what the call is regarding ... not impressed!

Caller: Call centre

This number has called me 4 Times today.
It is an Indian call centre wanting to talk about the nsw gov
Solar scheme

Scam

Keeps calling, I don’t answer I reject the call, I’d love to know who keeps calling

Received call that I didn’t answer. And they didn’t leave me a message.

Unknown caller. Hangs up when you answer

Calling to ask if I am and home owner or not and that the government is offering a free hot water system.
When asked how they got my number, they said for the Australia database registery.
Mentioned I was on the do not call register and they said they'll remove and hung up quite quickly.
Sounds like a scam call from overseas,

Hang up when you answer

Did not recognise will not answer!

Called and left no message. I don’t return calls from numbers I don’t recognise unless they leave a message.

Calls and just hangs up when I pick up!